Installation guide
Figure
18
Comfort
Alert™
Diagnostics
(some
models)
Status
LED
Status
LED
Description
Status
LED
Troubleshooting
Information
Green
“POWER”
|
Module
has
power
Supply
voltage
is
present
at
module
terminals
Red
“TRIP”
Thermostat
demand
signal
|
1.
Compressor
protector
is
open
Y1
is
present,
but
the
com-
|
2.
Outdoor
unit
power
disconnect
is
open
pressor
is
not
running
3.
Compressor
circuit
breaker
or
fuse(s)
is
open
4.
Broken
wire
or
connector
is
not
making
contact
5.
Low
pressure
switch
open
if
present
in
system
6,
Compressor
contactor
has
failed
open
Yellow
“ALERT”
|Long
Run
Time
1.
Low
refrigerant
charge
Flash
Code
1
Compressor
is
running
ex-
|
2.
Evaporator
blower
is
not
running
tremely
long
run
cycles
3.
Evaporator
coil
is
frozen
4.
Faulty
metering
device
5.
Condenser
coil
is
dirty
6.
Liquid
line
restriction
(filter
drier
blocked
if
present
in
system)
7.
Thermostat
is
malfunctioning
Yellow
“ALERT”
|
System
Pressure
Trip
1.
High
head
pressure
Flash
Code
2
Discharge
or
suction
pres-
|
2.
Condenser
coil
poor
air
circulation
(dirty,
blocked,
damaged)
sure
out
of
limits
or
com-
3.
Condenser
fan
is
not
running
pressor
overloaded
4.
Return
air
duct
has
substantial
leakage
5.
If
low
pressure
switch
present
in
system,
check
Flash
Code
1
information
Yellow
“ALERT”
|
Short
Cycling
1.
Thermostat
demand
signal
is
intermittent
Flash
Code
3
Compressor
is
running
only
|
2.
Time
delay
relay
or
control
board
defective
briefly
3.
If
high
pressure
switch
present
go
to
Flash
Code
2
informa-
tion
4.
If
low
pressure
switch
present
go
to
Flash
Code
1
informa-
tion
Yellow
“ALERT”
|
Locked
Rotor
1.
Run
capacitor
has
failed
Flash
Code
4
2.
Low
line
voltage
(contact
utility
if
voltage
at
disconnect
is
low)
3.
Excessive
liquid
refrigerant
in
compressor
4.
Compressor
bearings
are
seized
Yellow
“ALERT”
|
Open
Circuit
1.
Outdoor
unit
power
disconnect
is
open
Flash
Code
5
2,
Compressor
circuit
breaker
or
fuse(s)
is
open
3.
Compressor
contactor
has
failed
open
4.
High
pressure
switch
is
open
and
requires
manual
reset
5.
Open
circuit
in
compressor
supply
wiring
or
connections
6.
Unusually
long
compressor
protector
reset
time
due
to
ex-
treme
ambient
temperature
7.
Compressor
windings
are
damaged
Yellow
“ALERT”
|
Open
Start
Circuit
1.
Run
capacitor
has
failed
Flash
Code
6
Current
only
in
run
circuit
2,
Open
circuit
in
compressor
start
wiring
or
connections
3.
Compressor
start
winding
is
damaged
Yellow
“ALERT”
|
Open
Run
Circuit
1.
Open
circuit
in
compressor
run
wiring
or
connections
Flash
Code
7
Current
only
in
start
circuit
|
2.
Compressor
run
winding
is
damaged
Yellow
“ALERT”
|
Welded
Contactor
1.
Compressor
contactor
has
failed
closed
Flash
Code
8
Compressor
always
runs
2.
Thermostat
demand
signal
not
connected
to
module
Yellow
“ALERT”
|
Low
Voltage
1.
Control
circuit
transformer
is
overloaded
Flash
Code
9
Control
circuit
<
17VAC
2.
Low
line
voltage
(contact
utility
if
voltage
at
disconnect
is
low)
«
Flash
Code
number
corresponds
to
a
number
of
LED
flashes,
followed
by
a
pause
and
then
repeated.
¢
TRIP
and
ALERT
LEDs
flashing
at
same
time
means
control
circuit
voltage
is
too
low
for
operation.
«
Reset
ALERT
Flash
code
by
removing
24VAC
power
from
module.
¢
Last
ALERT
Flash
code
is
displayed
for
1
minute
after
module
is
powered
on.
428
01
5103
02
19